title: Emergence of vertebrate retroviruses and envelope capture.
mesh_terms: D000818:Animals; D002415:Cats; D015368:Human T-lymphotropic virus 1 / Q000235:genetics; D006801:Humans; D051379:Mice; D011995:Recombination, Genetic; D018626:Retroelements / Q000235:genetics; D012190:Retroviridae / Q000235:genetics*; D014714:Vertebrates / Q000821:virology*; D014759:Viral Envelope Proteins / Q000235:genetics*
chemical_list: D018626:Retroelements; D014759:Viral Envelope Proteins